A person who fixes the glass portion of windows is called a glazier.
A cobbler.
When someone has no hair they are bald
What you call person who fixes light
what do we call the hair specialist doctor?
If you mean 'What do you call someone who repairs books?' then I think the answer is a 'bookbinder'. Sources: 'Inkheart' by Cornelia Funke
Hair stylist or a barber.
Hairdresser, hair stylist, beautician, barber
a chiminey sweep (cleans them) a repair man (fixes them) a contractor (builds them) A steeple jack.
Horologist
I think the most proper name would be glazier, which is someone who installs and repairs glass.
Groomer